Compare models
Pick up to 4. Every model here is free in free-pi.
Solar Pro 4 GPT-6.1 Terra GPT-6 Luna
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- DeepSeek V4 Flash
- Abliterated Large Flash
- Abliterated Large V2
- Claude Haiku 5.5
- DeepSeek V4.1 Flash
- DeepSeek V4.1 Flash Abliterated
- DeepSeek V4 Pro
- Gemma 4 Uncensored
- GLM 4.7 Flash Heretic
- GLM 5.3 Flash
- GPT-6.1 Sol Flex
- GPT-6.1 Terra Flex
- GPT-6 Luna Flex
- GPT-OSS 120B
- Kimi K3.1 Pro
- Laguna S 2.1 (Poolside)
- MiMo V2.6 Flash (Xiaomi)
- Muse Spark 1.3 Contributor
- Muse Spark Open (Meta)
- Qwen3.5 35B
- Qwen 3.6 Plus Uncensored
- Uncensored 1.2
| Attribute | Solar Pro 4 | GPT-6.1 Terra | GPT-6 Luna |
|---|---|---|---|
| Maker | Upstage | OpenAI | OpenAI |
| Usage in free-pi | ~0.6x usage | premium, uses allowance fast · ~20x usage | ~2.0x usage |
| Intelligence index | 28.2 | 51 (best) | 27.8 |
| Coding index | 52.7 | — | — |
| Context window | 524,288 tokens | 1,050,000 tokens (best) | 1,050,000 tokens (best) |
| Max output | 131,072 tokens (best) | 128,000 tokens | 128,000 tokens |
| Inputs | Text | Text, image, file (best) | Text, image, file (best) |
| Tool calling | Yes | Yes | Yes |
| Reasoning effort | Yes | Yes | Yes |
| Structured output | Yes | Yes | Yes |
| Released | Aug 10, 2026 | Oct 26, 2026 | Sep 22, 2026 |
| Model page | Model page | Model page | Model page |
Stats refreshed automatically. Usage rate from free-pi. Green marks the best value in each row. “—” means no figure is available.